1.(a)Draw a line from each circuit symbol below to the correct name.
Draw only four lines.
circuit symbolname
3 marks
(b)Fred made circuit 1 as shown below.
Give the name of the part that is the energy source for the circuit.
......
1 mark
(c)Fred then made circuit 2 as shown below.
In the table below, tick a box to show whether circuit 1 and circuit 2 are series or parallel circuits.
Tick only two boxes.
circuit 1
circuit 2
1 mark
(d)What metal is usually used for wires in electric circuits?
......
1 mark
maximum 6 marks
2.Nina’s bicycle has a front lamp and a rear lamp.
Both lamps are connected to the same battery.
(a)The circuit diagram for the lamps is drawn below.
(i)On the circuit diagram above, place a letter A to show the position of a switch to turn only the front lamp on and off.
1 mark
(ii)On the circuit diagram above, place a letter B to show the position of a switch to turn both lamps on and off at the same time.
1 mark
(b)The bulb in the rear lamp gives out white light.
White light is a mixture of all the colours of light.
The plastic cover acts as a red filter.
Red light passes through the filter.
What happens to the other colours that do not pass through?
......
1 mark
(c)Nina replaces the battery with a generator called a dynamo.
When Nina pedals her bicycle, the back wheel turns the generator.
Complete the sentences below using words from the box.
chemicalelectricalgravitationalkineticlightsoundthermal
As Nina pedals, ...... energy in her muscles is
changed to kinetic energy.
When the generator turns, kinetic energy is changed to useful
...... energy in the wires. This energy in the wires is
changed to useful ...... energy in the bulb.
When the lamps are on, some of the energy in the bulb is wasted as
...... energy.
4 marks
maximum 7 marks
3.(a)Max built circuit 1 as shown below.
circuit 1
He closed the switch, S, and all the bulbs came on.
One of the bulbs then broke and all the bulbs went off.
Which bulb must have broken?
Give the letter.
......
1 mark
(b)Max built circuit 2 as shown below.
He connected a plastic comb and a metal key in different parts of the circuit.
circuit 2
Look carefully at circuit 2.
Complete the table below to show which bulbs in circuit 2 will be on or off when different switches are open or closed.
Write on or off in the boxes below.
open / open / off / off / off
open / closed
closed / open
2 marks
(c)Max built circuit 3 using a battery, two bulbs and three ammeters.
circuit 3
The current reading on ammeter A1was 0.8 amps.
What would be the reading on ammeters A2 and A3?
Place one tick in the table by the correct pair of readings.
ammeter A2(amps)ammeter A3(amps) / correct pair of readings
0.80.8
0.80.4
0.40.8
0.40.4
1 mark
maximum 4 marks
4.The diagram shows two dodgem cars at a fairground. The circuit symbols for the motor and pedal for each dodgem car are shown on the diagram.
(a)Complete the following sentence.
Each dodgem car is connected to the power supply through the
...... which is in contact with the wire
mesh, and through the ...... which is
in contact with the metal floor.
1mark
(b)Dodgem cars are connected using parallel circuits.
Complete the circuit diagram below for the two dodgem cars.
Use two motor symbols, , and two switch symbols, .
The power supply for the circuit has been drawn for you.
2marks
(c)Even when the power supply is switched on, the dodgem car will not move until the pedal is pressed. Give the reason for this.
......
......
1mark
(d)A man looks after the dodgem cars during the rides.
Why does the man not get an electric shock as he walks across the metal floor?
......
......
1mark
(e)During one ride, the two dodgem cars are running. The pick-up wire on one car snaps off. Describe how this affects:
(i)the dodgem car with the broken pick-up wire;
......
1mark
(ii)the other dodgem car.
......
1mark
Maximum 7 marks
5.The drawing shows a hairdryer.
Ben drew the diagram below to show the circuit of the hairdryer.
(a)Which of the switches must be closed for the heater to work? Tick the correct box.
switchswitchswitchesneither switch
1 only2 only1 and 21 nor 2
1 mark
(b)With this circuit, is it possible to have the heater on when the motor is switched off?
…………
Explain your answer.
……………..……………………………….…………………..……………………
……………..……………………………….…………………..……………………
1 mark
(c)The motor and the heater are both on.
The motor blows air through the hairdryer. If the motor breaks, what would happen to thetemperature of the hairdryer?
……………..……………………………….…………………..……………………
1 mark
(d)The motor and the heater are both on. Suddenly the wire in the heater breaks.
What effect, if any, will this have on the motor?
……………..……………………………….…………………..……………………
1 mark
Maximum 4 marks
6.David made two electromagnets as shown below.
He used paper-clips to test the strength of each electromagnet.
He switched on the power supply in both circuits.
(a)How can you tell that the strength of both electromagnets is the same?
......
......
1 mark
(b)David switched off the power supply in both circuits.
The paper-clips fell off the iron core, but not off the steel core.
Why is iron used, rather than steel, for the core of an electromagnet?
Use the diagrams above to help you.
......
......
1 mark
(c)David used a sensor to measure the strength of an electromagnet.
He placed the sensor 25 mm from the electromagnet and increased the current in the coil.
He repeated the experiment with the sensor 50 mm from the electromagnet.
The graph below shows his results.
(i)How did the distance of the sensor from the electromagnet affect the reading on the sensor?
......
......
1 mark
(ii)How did the size of the current in the coil affect the strength of the electromagnet?
......
......
1 mark
(iii)What else could David do to an electromagnet to change its strength?
......
......
1 mark
maximum 5 marks
7.Gary uses the following circuit to operate the electric motor of his model crane.
Look carefully at the way Gary has connected the two cells.
When he closes switch A the motor runs and the crane lifts a load.
(a)Gary opens switch A and closes switch B.
Describe what happens to the motor.
......
......
1 mark
(b)Gary closes both switches, A and B. Describe what happens to the motor.
......
1 mark
(c)Both switches should not be closed at the same time. Explain why.
......
......
1 mark
(d)Gary puts a resistor into his circuit as shown.
What difference does the resistor make to the motor:
(i)when switch A is closed and switch B is open?
......
......
1 mark
(ii)when switch A is open and switch B is closed?
......
......
1 mark
Maximum 5 marks
8.The diagram below shows three trolleys.
Peter put a bar magnet on each trolley.
(a)He pushed trolleys A, B and C together.
•Magnet B attracted magnet A.
•Magnet B repelled magnet C.
On the diagram above, label the north and south poles of
magnets A and C.
Use the letters N and S.
2 marks
(b)Peter turned trolley B around. Trolleys A and C were not turned around.
What would happen now when Peter pushed them all together?
Use either attract or repel to complete each sentence below.
Magnet B would ...... magnet A.
Magnet B would ...... magnet C.
1 mark
(c)Peter held two trolleys close together and then let go.
The magnets repelled each other.
Draw an arrow on both magnets to show which way they would move.
1 mark
(d)Peter took a magnet, a steel bar and an aluminium bar.
He put them on three trolleys as shown below.
(i)What happens to the steel bar as he moves it closer to the magnet?
......
1 mark
(ii)What happens to the aluminium bar as he moves it closer to the magnet?
......
1 mark
maximum 6 marks
9.A compass needle is a small magnet with a North pole, N, and a South pole, S.
Ruth placed two compasses onto a piece of card.
Both compass needles pointed in the direction shown below.
(a)Ruth placed a bar magnet with its South pole between the two compasses.
The compass needles moved as shown below.
On the diagram below, label the North pole and South pole of each compass needle. Use the letters N and S.
1 mark
(b)Ruth turned the bar magnet round so that the North pole was between the two compasses.
On the diagram below, label the North pole and South pole of each compass needle now.
Use the letters N and S.
1 mark
(c)Ruth repeated her experiment with an aluminium bar instead of a bar magnet.
What happened to the compass needles?
......
1 mark
maximum 3 marks
10.(a)Debbie put a paper cup into a glass beaker.
She glued a magnet in the bottom of the paper cup.
She glued another magnet in the bottom of the beaker.
The magnets repelled.
diagram A
not to scale
What two forces act on the paper cup and its contents to keep it in this position?
1......
1 mark
2......
1 mark
(b)Debbie put 5 g of aluminium rivets into the paper cup.
It moved down a little as shown in diagram B.
diagram B
not to scale
Debbie plotted a graph to show how the mass of aluminium rivets affected the distance the cup moved down.
(i)Use the graph to find the mass that made the cup move down 4 mm.
...... g
1 mark
(ii)Why did the graph stay flat with masses greater than 40 g?
......
1 mark
(c)Debbie removed the 5 g of aluminium rivets and put 5 g of iron nails into the cup.
diagram C
not to scale
The paper cup moved down more with 5 g of iron nails than with 5 g of aluminium rivets as shown in diagram C.
Give the reason for this.
......
......
1 mark
maximum 5 marks
11.Paulo drops a bar magnet into a box of nails. When he picks the magnet up, some nails are sticking to the ends.
(a)What material are the nails made from?
......
1 mark
(b)The nails stick to the ends of the bar magnet but not to the middle.
Why do the nails stick to the ends of the magnet?
......
......
1 mark
(c)Paulo puts a magnet on a piece of cork. He floats the cork on water in a plastic bowl, and spins it round slowly.
When the cork stops spinning, in which direction will the magnet point?
......
1 mark
(d)Paulo takes a second, identical bar magnet. The two magnets stick together as shown. One of the poles has been labelled on the drawing.
(i)Label the other three poles.
1 mark
(ii)Paulo puts the two magnets on the piece of cork. He floats the cork on the water in the plastic bowl, and again spins it round slowly.
In which direction will the magnets point at the end of the experiment?
Tick the correct box.
In a north-south direction.
In an east-west direction.
Could be in any direction.
The cork does not stop spinning.
1 mark
Maximum 5 marks
12.Rachel has a small block of metal. She wants to know if it is a magnet.
She holds the North pole of the bar magnet near one end of the block of metal.
They attract. Then she holds the South pole of the bar magnet near the same end of the block of metal. Again they attract.
(a)Explain how this shows that Rachel’s block of metal is not a permanent magnet.
......
......
1 mark
(b)What metal could Rachel’s block be made from?
………………………………………………………………………………………
1 mark
(c)Rachel puts the block of metal in a thin plastic bag.
What effect, if any, will the bar magnet now have on the block?
......
......
1 mark
(d)Rachel puts the bar magnet into a pile of coins. Some of the coins are attracted to the magnet but some are not.
Suggest a reason for this.
......
......
1 mark
Maximum 4 marks
13.Some pupils made an electric cell using two different metals and a lemon.
They put strips of copper and zinc into a lemon and connected them to the terminals of an electric clock.
(a)Look at the photograph.
What evidence is there that they have made an electric cell?
......
1 mark
(b)The pupils had pieces of copper, zinc, iron and magnesium and some lemons.
They wanted to find out which pair of metals made the cell with the biggest voltage.
What equipment should they use to measure the voltage of their cells?
......
1 mark
(c)In their investigation they used different pairs of metals.
Give one factor that they should keep the same.
......
1 mark
(d)The pupils measured the voltage produced by different pairs of metals.
Their results are recorded below.
magnesium / zinc / iron / copper
copper / 1.7 / 0.9 / 0.8 / 0
iron / 1.3 / 0.1 / 0 / -
zinc / 0.8 / 0 / - / -
magnesium / 0 / - / - / -
Which pair of metals made the cell with the biggest voltage?
...... and ......
1 mark
(e)Look at the results in the table above.
Why should the pupils not use pairs of the same type of metal for the clock?
......
......
1 mark
maximum 5 marks
14.Lorna built the circuit drawn below. All the bulbs are identical.
(a)Complete the table below by writing on or off for each bulb.
switch / bulbS1 / S2 / A / B
open / open / off / off
open / closed
closed / open
closed / closed
3 marks
(b)Lorna then built a different circuit as shown below.
How could Lorna get both bulbs to light at the same time in this circuit?
......
......
1 mark
maximum 4 marks
15.Peter measured the current through each of three similar bulbs in a parallel circuit.
He had only one ammeter and he placed it first at A1, then A2, then A3, in order to measure the currents.
The table shows his results.
position of ammeter / current, in ampsA1 / 0.14
A2 / 0.16
A3 / 0.15
(a)He expected the current readings to be the same for each bulb but found they were different.
Suggest two reasons why the readings were different.
1......
2......
2 marks
(b)Peter then measured the current at A4 and recorded it as 0.45 A. He concluded that the current at A4 could be calculated by adding together the currents through each of the bulbs at positions A1, A2 and A3.
He added two more similar bulbs to his circuit, in parallel. The current through each bulb was 0.15 A.
Use Peter's conclusion to predict the current at A4 with the 5 bulbs in the circuit.
...... A
1 mark
(c)Peter left the circuit connected overnight. He used a datalogger to measure the current at position A4 at regular intervals of time. The next morning the bulbs were dim.
Using the axes below, sketch (do not plot) how the current at position A4 might change with time.
Indicate on the graph:
(i)The correct labels for each axis, including the correct units.
(ii)The shape of the graph you would expect to obtain.
2 marks
Maximum 5 marks
16.Nikki tries to set up four electric circuits.
diagram 1
(a)In diagram 1 the ammeter reading is zero. What is wrong with this circuit?
......
......
1 mark
diagram 2
(b)In diagram 2 the ammeter reading is zero. What is wrong with this circuit?
......
......
1mark
diagram 3
(c)In diagram 3 the ammeter reading is zero. Why is this not a complete circuit?
......
......
1mark
diagram 4
(d)In diagram 4, why is there a reading on the ammeter?
......
......
1mark
Maximum 4 marks
Bishop Challoner Catholic School1